/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:36:23,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:36:23,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:36:23,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:36:23,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:36:23,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:36:23,912 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:36:23,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:36:23,937 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:36:23,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:36:23,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:36:23,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:36:23,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:36:23,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:36:23,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:36:23,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:36:23,939 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:36:23,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:36:23,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:36:23,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:36:23,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:36:23,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:36:23,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:36:23,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:23,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:36:23,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:36:23,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:36:23,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:36:23,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:36:23,942 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:36:24,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:36:24,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:36:24,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:36:24,140 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:36:24,142 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:36:24,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2022-01-10 06:36:24,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a89cc780/06cfebc428fc45ecb08e99ac5be451c3/FLAGd05a5d686 [2022-01-10 06:36:24,491 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:36:24,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2022-01-10 06:36:24,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a89cc780/06cfebc428fc45ecb08e99ac5be451c3/FLAGd05a5d686 [2022-01-10 06:36:24,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a89cc780/06cfebc428fc45ecb08e99ac5be451c3 [2022-01-10 06:36:24,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:36:24,928 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:36:24,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:24,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:36:24,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:36:24,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:24" (1/1) ... [2022-01-10 06:36:24,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493be472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:24, skipping insertion in model container [2022-01-10 06:36:24,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:24" (1/1) ... [2022-01-10 06:36:24,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:36:24,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:36:25,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c[715,728] [2022-01-10 06:36:25,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:25,076 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:36:25,085 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c[715,728] [2022-01-10 06:36:25,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:25,097 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:36:25,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25 WrapperNode [2022-01-10 06:36:25,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:25,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:25,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:36:25,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:36:25,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,119 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:36:25,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:25,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:36:25,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:36:25,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:36:25,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:36:25,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:36:25,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:36:25,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:36:25,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (1/1) ... [2022-01-10 06:36:25,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:36:25,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:36:25,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:36:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-01-10 06:36:25,198 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-01-10 06:36:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:36:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:36:25,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:36:25,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:36:25,236 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:36:25,237 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:36:25,344 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:36:25,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:36:25,348 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:36:25,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:25 BoogieIcfgContainer [2022-01-10 06:36:25,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:36:25,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:36:25,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:36:25,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:36:25,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:36:24" (1/3) ... [2022-01-10 06:36:25,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74178a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:25, skipping insertion in model container [2022-01-10 06:36:25,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:25" (2/3) ... [2022-01-10 06:36:25,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74178a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:25, skipping insertion in model container [2022-01-10 06:36:25,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:25" (3/3) ... [2022-01-10 06:36:25,355 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2022-01-10 06:36:25,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:36:25,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:36:25,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:36:25,392 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:36:25,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:36:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:36:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:36:25,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:25,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:25,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash 377493052, now seen corresponding path program 1 times [2022-01-10 06:36:25,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:25,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403175960] [2022-01-10 06:36:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:25,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:25,418 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:25,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:36:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:25,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:36:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:25,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:25,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403175960] [2022-01-10 06:36:25,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403175960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:25,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:25,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:36:25,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653097786] [2022-01-10 06:36:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:25,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:36:25,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:36:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:25,672 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:25,740 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-01-10 06:36:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:36:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:36:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:25,747 INFO L225 Difference]: With dead ends: 27 [2022-01-10 06:36:25,747 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 06:36:25,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:36:25,751 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:25,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 06:36:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 06:36:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:36:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:36:25,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 06:36:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:25,774 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:36:25,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:36:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:36:25,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:25,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:25,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:25,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,978 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash -458075208, now seen corresponding path program 1 times [2022-01-10 06:36:25,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671563263] [2022-01-10 06:36:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:25,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:25,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:25,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:25,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:36:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:36:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:36:26,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:26,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671563263] [2022-01-10 06:36:26,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671563263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:26,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:26,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:36:26,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763254103] [2022-01-10 06:36:26,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:26,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:36:26,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:36:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:36:26,042 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:26,085 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 06:36:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:36:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:36:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:26,086 INFO L225 Difference]: With dead ends: 23 [2022-01-10 06:36:26,086 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 06:36:26,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:36:26,088 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:26,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:36:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 06:36:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 06:36:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:36:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:36:26,092 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 06:36:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:26,093 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:36:26,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:36:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:36:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:36:26,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:26,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:26,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:26,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:26,300 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash -355642372, now seen corresponding path program 1 times [2022-01-10 06:36:26,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:26,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491539517] [2022-01-10 06:36:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:26,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:26,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:26,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:36:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:26,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:36:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:36:26,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:36:26,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491539517] [2022-01-10 06:36:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491539517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:26,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:26,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:36:26,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854415961] [2022-01-10 06:36:26,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:36:26,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:36:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:36:26,689 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:36:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:26,783 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-10 06:36:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:36:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2022-01-10 06:36:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:26,784 INFO L225 Difference]: With dead ends: 27 [2022-01-10 06:36:26,784 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:36:26,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:36:26,785 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:26,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:36:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-10 06:36:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 06:36:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-10 06:36:26,790 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-10 06:36:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:26,790 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-10 06:36:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:36:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-10 06:36:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:36:26,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:26,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:26,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:26,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:27,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1118758198, now seen corresponding path program 1 times [2022-01-10 06:36:27,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362030336] [2022-01-10 06:36:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:27,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:27,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:27,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:36:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:27,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:36:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:36:27,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:36:27,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362030336] [2022-01-10 06:36:27,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362030336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:27,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:27,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:36:27,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347219254] [2022-01-10 06:36:27,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:27,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:36:27,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:36:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:36:27,278 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:36:27,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:27,363 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2022-01-10 06:36:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:36:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2022-01-10 06:36:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:27,364 INFO L225 Difference]: With dead ends: 45 [2022-01-10 06:36:27,364 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:36:27,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:36:27,366 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:27,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:36:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 06:36:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-10 06:36:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2022-01-10 06:36:27,374 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 23 [2022-01-10 06:36:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:27,374 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2022-01-10 06:36:27,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:36:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2022-01-10 06:36:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:36:27,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:27,375 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:27,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:27,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:27,582 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash -844275908, now seen corresponding path program 2 times [2022-01-10 06:36:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511018514] [2022-01-10 06:36:27,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:27,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:27,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:27,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:36:27,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:36:27,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:36:27,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:36:28,098 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:28,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511018514] [2022-01-10 06:36:28,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511018514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:28,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:28,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:36:28,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758980394] [2022-01-10 06:36:28,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:36:28,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:36:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:36:28,099 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:36:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:28,258 INFO L93 Difference]: Finished difference Result 60 states and 110 transitions. [2022-01-10 06:36:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:36:28,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 34 [2022-01-10 06:36:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:28,261 INFO L225 Difference]: With dead ends: 60 [2022-01-10 06:36:28,261 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 06:36:28,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:36:28,263 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:28,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 58 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 06:36:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-10 06:36:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:36:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 06:36:28,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 34 [2022-01-10 06:36:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:28,268 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 06:36:28,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:36:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 06:36:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:36:28,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:28,270 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:28,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:28,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:28,480 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1481106390, now seen corresponding path program 2 times [2022-01-10 06:36:28,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:28,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127426730] [2022-01-10 06:36:28,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:28,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:28,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:28,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:36:28,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:36:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:36:28,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:36:28,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127426730] [2022-01-10 06:36:28,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127426730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:28,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:28,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:36:28,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869584676] [2022-01-10 06:36:28,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:28,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:36:28,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:36:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:36:28,818 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:36:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:28,910 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 06:36:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:36:28,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2022-01-10 06:36:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:28,911 INFO L225 Difference]: With dead ends: 67 [2022-01-10 06:36:28,912 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:36:28,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:36:28,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:28,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:36:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-10 06:36:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-10 06:36:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2022-01-10 06:36:28,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 36 [2022-01-10 06:36:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:28,919 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2022-01-10 06:36:28,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:36:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2022-01-10 06:36:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:36:28,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:28,920 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:28,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:36:29,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:29,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash 677806456, now seen corresponding path program 3 times [2022-01-10 06:36:29,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:29,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211155340] [2022-01-10 06:36:29,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:29,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:29,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:29,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:36:29,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:36:29,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:29,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:36:29,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 180 proven. 5 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 06:36:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 06:36:29,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211155340] [2022-01-10 06:36:29,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211155340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:29,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-10 06:36:29,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355210960] [2022-01-10 06:36:29,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:29,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:36:29,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:36:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:29,805 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:36:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:29,903 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-01-10 06:36:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:36:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 83 [2022-01-10 06:36:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:29,905 INFO L225 Difference]: With dead ends: 66 [2022-01-10 06:36:29,905 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 06:36:29,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:36:29,906 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:29,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 06:36:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 06:36:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-10 06:36:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-10 06:36:29,909 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 83 [2022-01-10 06:36:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:29,910 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-10 06:36:29,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:36:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-10 06:36:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:36:29,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:29,911 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:29,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:30,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:30,117 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1187040136, now seen corresponding path program 4 times [2022-01-10 06:36:30,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:30,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416789962] [2022-01-10 06:36:30,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:30,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:30,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:30,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:30,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:36:30,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:30,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:30,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:36:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 154 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 06:36:30,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-01-10 06:36:30,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416789962] [2022-01-10 06:36:30,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416789962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:30,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:30,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2022-01-10 06:36:30,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514114555] [2022-01-10 06:36:30,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:30,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:36:30,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:36:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:36:30,738 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:36:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:30,857 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-01-10 06:36:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:36:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 87 [2022-01-10 06:36:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:30,858 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:36:30,858 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:36:30,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:36:30,859 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:30,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:36:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-10 06:36:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-01-10 06:36:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-10 06:36:30,864 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 87 [2022-01-10 06:36:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:30,864 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-10 06:36:30,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:36:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-10 06:36:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 06:36:30,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:30,865 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:30,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:31,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:31,076 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 984338690, now seen corresponding path program 5 times [2022-01-10 06:36:31,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:31,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58259682] [2022-01-10 06:36:31,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:31,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:31,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:31,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:31,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:36:31,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-10 06:36:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 06:36:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 318 proven. 265 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-10 06:36:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 321 proven. 309 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2022-01-10 06:36:33,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58259682] [2022-01-10 06:36:33,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58259682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:33,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:33,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 23 [2022-01-10 06:36:33,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683189910] [2022-01-10 06:36:33,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:33,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:36:33,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:36:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:36:33,433 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:36:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:33,929 INFO L93 Difference]: Finished difference Result 99 states and 164 transitions. [2022-01-10 06:36:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:36:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) Word has length 137 [2022-01-10 06:36:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:33,931 INFO L225 Difference]: With dead ends: 99 [2022-01-10 06:36:33,931 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:36:33,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 241 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:36:33,935 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 146 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:33,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 145 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:36:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-01-10 06:36:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (29), 13 states have call predecessors, (29), 10 states have call successors, (29) [2022-01-10 06:36:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2022-01-10 06:36:33,953 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 137 [2022-01-10 06:36:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:33,954 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2022-01-10 06:36:33,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:36:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2022-01-10 06:36:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:36:33,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:33,955 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:33,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:34,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:34,162 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1088532606, now seen corresponding path program 6 times [2022-01-10 06:36:34,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257517465] [2022-01-10 06:36:34,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:36:34,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:34,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:34,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:34,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:36:34,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 06:36:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:36:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 212 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-01-10 06:36:34,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 238 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-01-10 06:36:34,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257517465] [2022-01-10 06:36:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257517465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:34,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:34,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:36:34,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372799005] [2022-01-10 06:36:34,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:34,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:36:34,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:36:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:36:34,906 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:36:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:35,061 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-01-10 06:36:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:36:35,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) Word has length 99 [2022-01-10 06:36:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:35,063 INFO L225 Difference]: With dead ends: 56 [2022-01-10 06:36:35,063 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 06:36:35,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:36:35,064 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:35,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 123 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 06:36:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 06:36:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-01-10 06:36:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2022-01-10 06:36:35,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 99 [2022-01-10 06:36:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:35,069 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2022-01-10 06:36:35,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:36:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2022-01-10 06:36:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 06:36:35,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:35,070 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:35,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:35,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1243171980, now seen corresponding path program 7 times [2022-01-10 06:36:35,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700246290] [2022-01-10 06:36:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:36:35,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:35,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:35,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:36:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:36:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 492 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2022-01-10 06:36:35,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 532 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2022-01-10 06:36:36,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700246290] [2022-01-10 06:36:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700246290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:36,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:36,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2022-01-10 06:36:36,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337091455] [2022-01-10 06:36:36,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:36,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:36:36,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:36:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:36:36,411 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:36:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:36,674 INFO L93 Difference]: Finished difference Result 120 states and 216 transitions. [2022-01-10 06:36:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:36:36,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 162 [2022-01-10 06:36:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:36,678 INFO L225 Difference]: With dead ends: 120 [2022-01-10 06:36:36,678 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 06:36:36,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 304 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:36:36,680 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:36,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 149 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:36:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 06:36:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2022-01-10 06:36:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (33), 15 states have call predecessors, (33), 12 states have call successors, (33) [2022-01-10 06:36:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2022-01-10 06:36:36,699 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 162 [2022-01-10 06:36:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:36,700 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2022-01-10 06:36:36,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:36:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2022-01-10 06:36:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 06:36:36,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:36,703 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:36,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:36,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:36,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash -579752484, now seen corresponding path program 8 times [2022-01-10 06:36:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:36,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812977245] [2022-01-10 06:36:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:36,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:36,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:36,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:36:37,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:37,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:36:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1042 refuted. 0 times theorem prover too weak. 3158 trivial. 0 not checked. [2022-01-10 06:36:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1099 refuted. 0 times theorem prover too weak. 3101 trivial. 0 not checked. [2022-01-10 06:36:38,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812977245] [2022-01-10 06:36:38,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812977245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:38,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:38,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2022-01-10 06:36:38,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128433205] [2022-01-10 06:36:38,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:36:38,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:36:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:36:38,512 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:36:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:38,827 INFO L93 Difference]: Finished difference Result 137 states and 257 transitions. [2022-01-10 06:36:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:36:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 263 [2022-01-10 06:36:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:38,831 INFO L225 Difference]: With dead ends: 137 [2022-01-10 06:36:38,831 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 06:36:38,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 503 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:36:38,833 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:38,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 194 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:36:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 06:36:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-01-10 06:36:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (34), 16 states have call predecessors, (34), 14 states have call successors, (34) [2022-01-10 06:36:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-10 06:36:38,843 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 263 [2022-01-10 06:36:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:38,844 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-10 06:36:38,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:36:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-10 06:36:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-01-10 06:36:38,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:38,850 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:38,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:39,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:39,060 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1072784672, now seen corresponding path program 9 times [2022-01-10 06:36:39,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:39,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874300409] [2022-01-10 06:36:39,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:39,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:39,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:39,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:39,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:36:39,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-01-10 06:36:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:36:39,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2708 refuted. 0 times theorem prover too weak. 15199 trivial. 0 not checked. [2022-01-10 06:36:39,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2785 refuted. 0 times theorem prover too weak. 15122 trivial. 0 not checked. [2022-01-10 06:36:41,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874300409] [2022-01-10 06:36:41,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874300409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:41,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:41,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:36:41,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213257818] [2022-01-10 06:36:41,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:41,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:36:41,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:36:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:36:41,894 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:36:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:42,326 INFO L93 Difference]: Finished difference Result 153 states and 275 transitions. [2022-01-10 06:36:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:36:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 528 [2022-01-10 06:36:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:42,327 INFO L225 Difference]: With dead ends: 153 [2022-01-10 06:36:42,327 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 06:36:42,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1030 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:36:42,328 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 120 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:42,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 252 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 06:36:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2022-01-10 06:36:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2022-01-10 06:36:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-01-10 06:36:42,333 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 528 [2022-01-10 06:36:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:42,333 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-01-10 06:36:42,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:36:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-01-10 06:36:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2022-01-10 06:36:42,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:42,346 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:42,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:42,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:42,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash -940082852, now seen corresponding path program 10 times [2022-01-10 06:36:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318242250] [2022-01-10 06:36:42,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:42,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:42,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:42,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:36:42,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:36:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 3174 proven. 2217 refuted. 0 times theorem prover too weak. 43308 trivial. 0 not checked. [2022-01-10 06:36:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 3174 proven. 2294 refuted. 0 times theorem prover too weak. 43231 trivial. 0 not checked. [2022-01-10 06:36:46,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:46,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318242250] [2022-01-10 06:36:46,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318242250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:46,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:46,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2022-01-10 06:36:46,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495056611] [2022-01-10 06:36:46,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:46,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:36:46,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:36:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:36:46,668 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (27), 12 states have call predecessors, (27), 17 states have call successors, (27) [2022-01-10 06:36:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:47,551 INFO L93 Difference]: Finished difference Result 207 states and 376 transitions. [2022-01-10 06:36:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-10 06:36:47,552 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (27), 12 states have call predecessors, (27), 17 states have call successors, (27) Word has length 856 [2022-01-10 06:36:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:47,555 INFO L225 Difference]: With dead ends: 207 [2022-01-10 06:36:47,555 INFO L226 Difference]: Without dead ends: 138 [2022-01-10 06:36:47,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1755 GetRequests, 1685 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1132, Invalid=3028, Unknown=0, NotChecked=0, Total=4160 [2022-01-10 06:36:47,557 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 298 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:47,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 112 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-10 06:36:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2022-01-10 06:36:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 66 states have internal predecessors, (76), 21 states have call successors, (21), 15 states have call predecessors, (21), 10 states have return successors, (57), 17 states have call predecessors, (57), 21 states have call successors, (57) [2022-01-10 06:36:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 154 transitions. [2022-01-10 06:36:47,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 154 transitions. Word has length 856 [2022-01-10 06:36:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:47,566 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 154 transitions. [2022-01-10 06:36:47,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (27), 12 states have call predecessors, (27), 17 states have call successors, (27) [2022-01-10 06:36:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 154 transitions. [2022-01-10 06:36:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-01-10 06:36:47,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:47,572 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:47,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:47,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:47,777 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1025532510, now seen corresponding path program 11 times [2022-01-10 06:36:47,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:47,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070334023] [2022-01-10 06:36:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:47,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:47,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:47,780 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:47,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:36:48,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2022-01-10 06:36:48,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 220 conjunts are in the unsatisfiable core [2022-01-10 06:36:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 21594 trivial. 0 not checked. [2022-01-10 06:36:50,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 21594 trivial. 0 not checked. [2022-01-10 06:36:58,307 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:58,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070334023] [2022-01-10 06:36:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070334023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:58,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2022-01-10 06:36:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355401960] [2022-01-10 06:36:58,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 06:36:58,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 06:36:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:36:58,309 INFO L87 Difference]: Start difference. First operand 99 states and 154 transitions. Second operand has 36 states, 29 states have (on average 1.206896551724138) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (24), 24 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-10 06:36:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:58,646 INFO L93 Difference]: Finished difference Result 111 states and 186 transitions. [2022-01-10 06:36:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:36:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.206896551724138) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (24), 24 states have call predecessors, (24), 8 states have call successors, (24) Word has length 692 [2022-01-10 06:36:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:58,648 INFO L225 Difference]: With dead ends: 111 [2022-01-10 06:36:58,648 INFO L226 Difference]: Without dead ends: 107 [2022-01-10 06:36:58,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1382 GetRequests, 1275 SyntacticMatches, 73 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:36:58,649 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:58,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1058 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:36:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-10 06:36:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-01-10 06:36:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 68 states have internal predecessors, (78), 22 states have call successors, (22), 15 states have call predecessors, (22), 11 states have return successors, (68), 19 states have call predecessors, (68), 22 states have call successors, (68) [2022-01-10 06:36:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 168 transitions. [2022-01-10 06:36:58,660 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 168 transitions. Word has length 692 [2022-01-10 06:36:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:58,661 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 168 transitions. [2022-01-10 06:36:58,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.206896551724138) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (24), 24 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-10 06:36:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 168 transitions. [2022-01-10 06:36:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-01-10 06:36:58,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:58,667 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:58,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:36:58,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:36:58,868 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1953529616, now seen corresponding path program 12 times [2022-01-10 06:36:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768907476] [2022-01-10 06:36:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:36:58,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:58,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:58,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:36:58,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:36:59,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-10 06:36:59,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:36:59,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61006 backedges. 1593 proven. 4994 refuted. 0 times theorem prover too weak. 54419 trivial. 0 not checked. [2022-01-10 06:37:00,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61006 backedges. 1593 proven. 5094 refuted. 0 times theorem prover too weak. 54319 trivial. 0 not checked. [2022-01-10 06:37:03,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768907476] [2022-01-10 06:37:03,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768907476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:03,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:03,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2022-01-10 06:37:03,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259940277] [2022-01-10 06:37:03,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:03,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:37:03,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:37:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:03,590 INFO L87 Difference]: Start difference. First operand 103 states and 168 transitions. Second operand has 23 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (29), 12 states have call predecessors, (29), 19 states have call successors, (29) [2022-01-10 06:37:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:04,073 INFO L93 Difference]: Finished difference Result 250 states and 475 transitions. [2022-01-10 06:37:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 06:37:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (29), 12 states have call predecessors, (29), 19 states have call successors, (29) Word has length 957 [2022-01-10 06:37:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:04,074 INFO L225 Difference]: With dead ends: 250 [2022-01-10 06:37:04,074 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 06:37:04,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1921 GetRequests, 1887 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-01-10 06:37:04,076 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 59 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:04,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 251 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:37:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 06:37:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 06:37:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:37:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 06:37:04,076 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 957 [2022-01-10 06:37:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:04,077 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 06:37:04,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (29), 12 states have call predecessors, (29), 19 states have call successors, (29) [2022-01-10 06:37:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 06:37:04,077 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 06:37:04,079 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 06:37:04,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:04,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:04,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-10 06:37:05,299 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 23) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L861 garLoopResultBuilder]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2022-01-10 06:37:05,300 INFO L854 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (not (= |fibonacci_#in~n| (_ bv1 32))) (= |fibonacci_#in~n| fibonacci_~n) (not (bvslt |fibonacci_#in~n| (_ bv1 32)))) [2022-01-10 06:37:05,300 INFO L854 garLoopResultBuilder]: At program point L22-1(line 22) the Hoare annotation is: (and (not (= |fibonacci_#in~n| (_ bv1 32))) (or (= (_ bv21 32) |fibonacci_#t~ret4|) (not (= |fibonacci_#in~n| (_ bv9 32)))) (let ((.cse3 (= (_ bv1 32) |fibonacci_#t~ret4|)) (.cse0 (= (_ bv4 32) |fibonacci_#in~n|)) (.cse5 (= |fibonacci_#in~n| (_ bv3 32))) (.cse4 (= |fibonacci_#in~n| (_ bv2 32))) (.cse2 (= |fibonacci_#in~n| (_ bv6 32))) (.cse6 (= |fibonacci_#in~n| (_ bv7 32))) (.cse1 (= |fibonacci_#in~n| fibonacci_~n))) (or (and (= (_ bv2 32) |fibonacci_#t~ret4|) .cse0 .cse1) (and (= (_ bv5 32) |fibonacci_#t~ret4|) .cse2 .cse1) (and .cse3 .cse1 .cse4) (and .cse3 .cse5 .cse1) (and (= (_ bv3 32) |fibonacci_#t~ret4|) .cse1 (= fibonacci_~n (_ bv5 32))) (and (not .cse0) (not .cse5) (not .cse4) .cse1 (not .cse2) (not (= |fibonacci_#in~n| (_ bv5 32))) (not .cse6)) (and (= (_ bv8 32) |fibonacci_#t~ret4|) .cse6 .cse1))) (not (bvslt |fibonacci_#in~n| (_ bv1 32))) (or (= (_ bv13 32) |fibonacci_#t~ret4|) (not (= |fibonacci_#in~n| (_ bv8 32))))) [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point L22-2(line 22) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 23) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-10 06:37:05,300 INFO L854 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (= |ULTIMATE.start_main_~x~0#1| (_ bv9 32)) [2022-01-10 06:37:05,300 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-10 06:37:05,301 INFO L858 garLoopResultBuilder]: For program point L29-1(line 29) no Hoare annotation was computed. [2022-01-10 06:37:05,301 INFO L854 garLoopResultBuilder]: At program point L27(lines 27 35) the Hoare annotation is: (= |ULTIMATE.start_main_~x~0#1| (_ bv9 32)) [2022-01-10 06:37:05,301 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2022-01-10 06:37:05,303 INFO L732 BasicCegarLoop]: Path program histogram: [12, 2, 1, 1] [2022-01-10 06:37:05,303 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 06:37:05,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:37:05 BoogieIcfgContainer [2022-01-10 06:37:05,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 06:37:05,311 INFO L158 Benchmark]: Toolchain (without parser) took 40382.90ms. Allocated memory was 198.2MB in the beginning and 253.8MB in the end (delta: 55.6MB). Free memory was 149.1MB in the beginning and 141.9MB in the end (delta: 7.2MB). Peak memory consumption was 129.2MB. Max. memory is 8.0GB. [2022-01-10 06:37:05,311 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 164.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:37:05,312 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.15ms. Allocated memory is still 198.2MB. Free memory was 149.0MB in the beginning and 176.4MB in the end (delta: -27.4MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-01-10 06:37:05,312 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.17ms. Allocated memory is still 198.2MB. Free memory was 176.4MB in the beginning and 174.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 06:37:05,312 INFO L158 Benchmark]: Boogie Preprocessor took 18.30ms. Allocated memory is still 198.2MB. Free memory was 174.8MB in the beginning and 173.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 06:37:05,312 INFO L158 Benchmark]: RCFGBuilder took 210.89ms. Allocated memory is still 198.2MB. Free memory was 173.8MB in the beginning and 164.4MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 06:37:05,312 INFO L158 Benchmark]: TraceAbstraction took 39960.31ms. Allocated memory was 198.2MB in the beginning and 253.8MB in the end (delta: 55.6MB). Free memory was 164.4MB in the beginning and 141.9MB in the end (delta: 22.5MB). Peak memory consumption was 144.6MB. Max. memory is 8.0GB. [2022-01-10 06:37:05,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 164.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.15ms. Allocated memory is still 198.2MB. Free memory was 149.0MB in the beginning and 176.4MB in the end (delta: -27.4MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.17ms. Allocated memory is still 198.2MB. Free memory was 176.4MB in the beginning and 174.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.30ms. Allocated memory is still 198.2MB. Free memory was 174.8MB in the beginning and 173.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 210.89ms. Allocated memory is still 198.2MB. Free memory was 173.8MB in the beginning and 164.4MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 39960.31ms. Allocated memory was 198.2MB in the beginning and 253.8MB in the end (delta: 55.6MB). Free memory was 164.4MB in the beginning and 141.9MB in the end (delta: 22.5MB). Peak memory consumption was 144.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 33]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.9s, OverallIterations: 16, TraceHistogramMax: 151, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1052 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 941 mSDsluCounter, 2720 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2346 mSDsCounter, 1510 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4627 IncrementalHoareTripleChecker+Invalid, 6137 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1510 mSolverCounterUnsat, 374 mSDtfsCounter, 4627 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8065 GetRequests, 7627 SyntacticMatches, 113 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=15, InterpolantAutomatonStates: 233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 120 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 389 PreInvPairs, 528 NumberOfFragments, 133 HoareAnnotationTreeSize, 389 FomulaSimplifications, 7562 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8009 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 28.5s InterpolantComputationTime, 4000 NumberOfCodeBlocks, 2882 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 7949 ConstructedInterpolants, 0 QuantifiedInterpolants, 14150 SizeOfPredicates, 75 NumberOfNonLiveVariables, 4203 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 291483/336374 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: x == 9bv32 RESULT: Ultimate proved your program to be correct! [2022-01-10 06:37:05,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...